ATE360600T1 - METHOD FOR IMPROVING THE FILTRABILITY OF BAUXITE - Google Patents
METHOD FOR IMPROVING THE FILTRABILITY OF BAUXITEInfo
- Publication number
- ATE360600T1 ATE360600T1 AT03778413T AT03778413T ATE360600T1 AT E360600 T1 ATE360600 T1 AT E360600T1 AT 03778413 T AT03778413 T AT 03778413T AT 03778413 T AT03778413 T AT 03778413T AT E360600 T1 ATE360600 T1 AT E360600T1
- Authority
- AT
- Austria
- Prior art keywords
- bauxite
- temperature
- alkaline solution
- atmospheric pressure
- filtrability
- Prior art date
Links
- 229910001570 bauxite Inorganic materials 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 239000012670 alkaline solution Substances 0.000 abstract 3
- 238000009835 boiling Methods 0.000 abstract 2
- 238000004131 Bayer process Methods 0.000 abstract 1
- 150000004645 aluminates Chemical class 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 230000029087 digestion Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
- C01F7/062—Digestion
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Nutrition Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Saccharide Compounds (AREA)
- Filtration Of Liquid (AREA)
- Fats And Perfumes (AREA)
- Looms (AREA)
Abstract
Process for the treatment of bauxite (10) by alkaline digestion, typically using the Bayer process in order to obtain alumina hydrate, characterized in that ground bauxite (11, 15) is added directly into an alkaline solution (21a) that is drawn off and that will be reinserted into the Bayer aluminate liquor circuit (20), the said alkaline solution (21a) being heated at a temperature such that after the said ground bauxite (11, 15) and the said alkaline solution have been brought into contact, the temperature of the slurry resulting from this mix is greater than a temperature close to the boiling temperature at atmospheric pressure, in other words typically greater than 95° C. and preferably greater than or equal to the boiling temperature at atmospheric pressure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0213408A FR2846319B1 (en) | 2002-10-25 | 2002-10-25 | METHOD OF ATTACKING BAUXITY IMPROVING THE FILTRABILITY OF SLUDGE AT THE END OF ATTACK |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE360600T1 true ATE360600T1 (en) | 2007-05-15 |
Family
ID=32088297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT03778413T ATE360600T1 (en) | 2002-10-25 | 2003-10-21 | METHOD FOR IMPROVING THE FILTRABILITY OF BAUXITE |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US7658896B2 (en) |
| EP (1) | EP1558525B1 (en) |
| CN (1) | CN1319861C (en) |
| AT (1) | ATE360600T1 (en) |
| AU (1) | AU2003285414B2 (en) |
| BR (1) | BR0315592B1 (en) |
| DE (1) | DE60313482D1 (en) |
| ES (1) | ES2285217T3 (en) |
| FR (1) | FR2846319B1 (en) |
| OA (1) | OA12953A (en) |
| RU (1) | RU2328446C2 (en) |
| UA (1) | UA79513C2 (en) |
| WO (1) | WO2004039729A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU697381B2 (en) * | 1994-06-07 | 1998-10-01 | Hatch Pty Ltd | Improved multi-cell heating system |
| FR2934852B1 (en) * | 2008-08-06 | 2011-06-24 | Alcan Int Ltd | IMPROVEMENT TO THE BAYER PROCESS FOR PRODUCTION OF ALUMINA TRIHYDRATE, SAID PROCESS COMPRISING A STEP IN WHICH THE SURSATURATED LIQUEUR IS FILTERED AT HIGH TEMPERATURE BEFORE DECOMPOSITION |
| PE20131146A1 (en) * | 2010-07-09 | 2013-10-05 | Rio Tinto Alcan Int Ltd | ADDITION OF FLOCULANT AND MIXING SPEED TO SEPARATE SOLID AND LIQUOR COMPONENTS FROM A PROCESS SLUDGE |
| CN102580362B (en) * | 2011-01-14 | 2014-05-28 | 北京化工大学 | Process flow for separating acid-insoluble substances in nitric phosphate production by chemical flocculence method |
| EP2886178A1 (en) * | 2013-12-20 | 2015-06-24 | Rio Tinto Alcan International Limited | Process and installation for producing alumina trihydrate by alkaline digestion of bauxite ore |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU121441A1 (en) * | 1958-03-12 | 1958-11-30 | В.А. Бернштейн | The method of producing alumina by high-temperature treatment of bauxite with an alkali solution |
| US3002809A (en) * | 1959-06-22 | 1961-10-03 | Nalco Chemical Co | Method of manufacture of high purity sodium aluminate |
| US4446117A (en) * | 1983-04-04 | 1984-05-01 | Alumina Development Corporation | Double digestion system to reduce formation of ferrous iron |
| US4511542A (en) * | 1984-05-24 | 1985-04-16 | Kaiser Aluminum & Chemical Corporation | Bayer process production of alumina hydrate |
| CN1037493A (en) * | 1988-05-11 | 1989-11-29 | 建筑工程公司 | The method of removing the evil of deposition red soil in the aluminum oxide production process |
| GB8906500D0 (en) * | 1989-03-21 | 1989-05-04 | Shell Int Research | Process for the production of aluminium hydroxide from bauxite |
| ES2042219T3 (en) * | 1989-10-13 | 1993-12-01 | Alcan International Limited | PROCEDURE AND APPARATUS FOR THE DECANTATION OF SUSPENSIONS. |
| US5545384A (en) * | 1991-10-30 | 1996-08-13 | Sumitomo Chemical Co., Ltd. | Process for production of aluminum hydroxide from ore containing alumina |
| CA2140773A1 (en) * | 1992-07-24 | 1994-02-03 | Anthony John Crisp | Process for extracting alumina from bauxite |
| AUPM761194A0 (en) * | 1994-08-23 | 1994-09-15 | Comalco Aluminium Limited | Improved process for the extraction of alumina from bauxite |
| FR2732332B1 (en) * | 1995-03-31 | 1997-05-09 | Pechiney Aluminium | PROCESS FOR TREATING ALUMINUM TRIHYDRATE WITH LOW REACTIVE SILICA CONTENT |
| CN1049874C (en) * | 1996-06-28 | 2000-03-01 | 中国长城铝业公司 | Technological process of pre-desiliconization for bauxite slurry |
| AUPO376296A0 (en) * | 1996-11-20 | 1996-12-12 | Comalco Aluminium Limited | Removal of silica from bauxite |
| FR2758544B1 (en) * | 1997-01-22 | 1999-02-26 | Pechiney Aluminium | IMPROVED PROCESS FOR TREATING ALUMINUM MONOHYDRATE RICH BAUXITES |
| FR2771081B1 (en) * | 1997-11-17 | 1999-12-17 | Pechiney Aluminium | PRODUCTION OF ALUMINUM TRIHYDRATE WITH SEPARATE MONITORING OF SODIUM AND GRANULOMETRY |
| US6086771A (en) * | 1997-12-12 | 2000-07-11 | Nalco Chemical Company | Water continuous emulsion polymers for improving scale control in the bayer process |
| AUPP370498A0 (en) * | 1998-05-25 | 1998-06-18 | Nalco Chemical Company | Dextran, starch and flocculant combination for improving red mud clarification |
| US6086834A (en) * | 1998-06-19 | 2000-07-11 | Alcan International Limited | Process for the removal of silica from an alkaline solution containing sodium aluminate |
| US6528028B2 (en) * | 1999-12-28 | 2003-03-04 | Showa Denko K.K. | Process for treating bauxite in which a desilication product and an insoluble residure are separately precipitated |
| RU2193524C2 (en) * | 2000-08-08 | 2002-11-27 | Открытое акционерное общество "Богословский алюминиевый завод" | Bauxite leaching process |
| FR2834979B1 (en) * | 2002-01-21 | 2004-02-20 | Pechiney Aluminium | SOLUBILIZATION OF CARBONATES BY RECYCLING CONDENSATES DURING THE PRESSURE ATTACK OF MONOHYDRATE BAUXITES |
-
2002
- 2002-10-25 FR FR0213408A patent/FR2846319B1/en not_active Expired - Fee Related
-
2003
- 2003-10-21 ES ES03778413T patent/ES2285217T3/en not_active Expired - Lifetime
- 2003-10-21 BR BRPI0315592-7A patent/BR0315592B1/en not_active IP Right Cessation
- 2003-10-21 US US10/530,352 patent/US7658896B2/en not_active Expired - Fee Related
- 2003-10-21 OA OA1200500130A patent/OA12953A/en unknown
- 2003-10-21 AU AU2003285414A patent/AU2003285414B2/en not_active Ceased
- 2003-10-21 WO PCT/FR2003/003104 patent/WO2004039729A1/en not_active Ceased
- 2003-10-21 UA UAA200504941A patent/UA79513C2/en unknown
- 2003-10-21 EP EP03778413A patent/EP1558525B1/en not_active Expired - Lifetime
- 2003-10-21 CN CNB2003801020411A patent/CN1319861C/en not_active Expired - Fee Related
- 2003-10-21 DE DE60313482T patent/DE60313482D1/en not_active Expired - Lifetime
- 2003-10-21 RU RU2005115860/15A patent/RU2328446C2/en not_active IP Right Cessation
- 2003-10-21 AT AT03778413T patent/ATE360600T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| UA79513C2 (en) | 2007-06-25 |
| FR2846319A1 (en) | 2004-04-30 |
| AU2003285414B2 (en) | 2007-12-20 |
| RU2328446C2 (en) | 2008-07-10 |
| US7658896B2 (en) | 2010-02-09 |
| CN1708457A (en) | 2005-12-14 |
| BR0315592B1 (en) | 2011-11-16 |
| OA12953A (en) | 2006-10-13 |
| EP1558525A1 (en) | 2005-08-03 |
| WO2004039729A1 (en) | 2004-05-13 |
| DE60313482D1 (en) | 2007-06-06 |
| ES2285217T3 (en) | 2007-11-16 |
| EP1558525B1 (en) | 2007-04-25 |
| RU2005115860A (en) | 2006-01-20 |
| AU2003285414A1 (en) | 2004-05-25 |
| CN1319861C (en) | 2007-06-06 |
| BR0315592A (en) | 2005-09-06 |
| FR2846319B1 (en) | 2004-12-10 |
| US20060051268A1 (en) | 2006-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RER | Ceased as to paragraph 5 lit. 3 law introducing patent treaties |